26th Australian Institute of Physics Congress and the Australian and New Zealand Conference on Optics and Photonics

Session

COMMAD: Light Emitters, Lasing and Characterisation

COMMAD

9 Dec 2026, 16:00

Belinda Hutchinson Building (The University of Sydney )

Conveners

COMMAD: Light Emitters, Lasing and Characterisation

• Michael Johnston (University of Oxford)

213. Optimising incoherence – Semiconductor Laser Delayed Optical Feedback System

Prof. Deb Kane (Australian National University)

09/12/2026, 16:00

COMMAD - Optoelectronic and Microelectronic Materials and Devices

Contributed Oral

Where within the coherence collapse regime of the key nonlinear laser system – the semiconductor laser with delayed optical feedback (SLDOF) – is the output at its most incoherent? This is a question that has evaded a full answer for decades but has finally been addressed. The answer and its understanding relies on 1. theoretical and numerical simulation (Opt. Lett. 51, 596–599413 (2026)),...

209. Towards flatband lasing in bottom-up Kagome lattice photonic crystal lasers

Dr Wei Wen Wong (The Australian National University)

09/12/2026, 16:15

COMMAD - Optoelectronic and Microelectronic Materials and Devices

Contributed Oral

Flatband lasers featuring near-dispersionless photonic bands offer a compelling pathway to overcome the band dispersion limitations inherent in conventional two-dimensional (2D) photonic crystals (PhCs) [1,2]. The near-zero photon group velocity in these bands generates an exceptionally large density of states across a broad range of in-plane wavevectors. This dramatically enhances...

249. Extrinsically modulating light emission from low-dimensional perovskites

Christopher Bailey (University of Sydney)

09/12/2026, 16:30

COMMAD - Optoelectronic and Microelectronic Materials and Devices

Contributed Oral

The capability to switch or modulate the light output from nanoscale structures is essential for the development of nano-sensing technology and high-density photonic computing. In their bulk form, metal halide perovskites have shown promise for optoelectronic applications including solar cells, photodetectors, and ionizing-radiation detectors. In low-dimensional perovskites, the additional...

133. Thermionic Emission of Topological Nodal Ring System Driving by an Off-resonant Laser

Abdullah Al-Mamun (University of Wollongong)

09/12/2026, 16:45

COMMAD - Optoelectronic and Microelectronic Materials and Devices

Contributed Oral

The thermionic emission properties of optically driven nodal ring semimet-
als (NRSMs) are investigated. Under off-resonant laser irradiation, the system can
be transformed into different topological phases, including Weyl semimetals (WSMs)
and semi-Dirac semimetals (SDSMs). The resulting modifications to the electronic
dispersion and density of states strongly influence the thermionic...

750. Quantitative Second Harmonic Generation Metrology for Non-Contact, In-Situ Detection of Interfacial Charge

Rishabh Mishra (University of New South Wales, Sydney, Australia)

09/12/2026, 17:00

COMMAD - Optoelectronic and Microelectronic Materials and Devices

Contributed Oral

Trapped and mobile interfacial charge is a primary driver of device instability in microelectronics, shifting threshold voltages in MOSFETs, limiting long-term reliability in high-k gate stacks, and degrading surface passivation in photovoltaics [1,2]. Characterizing this charge is central to interface quality control, yet established techniques remain limited: capacitance-voltage (C-V)...

765. Electron Beam Induced Current study of Reactive Ion Etch induced pn junctions in Mercury Cadmium Telluride

Daniel Morley (University of Western Australia)

09/12/2026, 17:15

COMMAD - Optoelectronic and Microelectronic Materials and Devices

Contributed Oral

The University of Western Australia (UWA) has established the use of Reactive Ion Etching (RIE) for n-on-p junction formation for high performance infrared imaging arrays made from Mercury Cadmium Telluride (MCT). A comprehensive understanding of RIE-induced effects on device parameters and the role of defects remains crucial for developing ultra-high quantum efficiency IR sensors and...